Online shopping startup Rebelstork raises $18 million from Maveron, Serena Williams to solve returns crisis

As online shopping booms, so too has the problem of merchandise returns that end up in landfills or get sold in bulk for pennies on the dollar. It’s a market failure that’s presented opportunity for some entrepreneurs. Among them: Emily Hosie, the founder and CEO of Rebelstork, a Toronto-based startup that seeks to help the environment and consumer brands, while building a meaningful business of its own in the process. Rebelstork’s online marketplace sells overstock items as well as returned baby gear at discount prices — a business it says...